The primary and most natural type of propulsion is the use of muscle power. The invention of the wheel allowed for the development of vehicles like Carts and Wagons that make more efficient use of muscle power, allowing larger loads to be transported. Vehicles drawn by humans and domesticated animals are not economically as important as they once were, but they still exist. Examples of human-powered vehicles are rickshaws and cycle rickshaws.

1.
Propulsion
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Propulsion is a means of creating force leading to movement. The term is derived from two Latin words, pro, meaning before or forward, and pellere, meaning to drive, a propulsion system consists of a source of mechanical power, and a propulsor. A technological system uses an engine or motor as the power source, components such as clutches or gearboxes may be needed to connect the motor to axles, wheels, or propellors. Biological propulsion systems use an animals muscles as the power source, an aircraft propulsion system generally consists of an aircraft engine and some means to generate thrust, such as a propeller or a propulsive nozzle. An aircraft propulsion system must achieve two things, first, the thrust from the propulsion system must balance the drag of the airplane when the airplane is cruising. And second, the thrust from the system must exceed the drag of the airplane for the airplane to accelerate. In fact, the greater the difference between the thrust and the drag, called the excess thrust, the faster the airplane will accelerate, some aircraft, like airliners and cargo planes, spend most of their life in a cruise condition. For these airplanes, excess thrust is not as important as high engine efficiency, some aircraft, like fighter planes or experimental high speed aircraft, require very high excess thrust to accelerate quickly and to overcome the high drag associated with high speeds. For these airplanes, engine efficiency is not as important as very high thrust, modern military aircraft typically employ afterburners on a low bypass turbofan core. Future hypersonic aircraft will employ some type of ramjet or rocket propulsion, ground propulsion is any mechanism for propelling solid bodies along the ground, usually for the purposes of transportation. The propulsion system consists of a combination of an engine or motor. Maglev is a system of transportation that uses magnetic levitation to suspend, guide and propel vehicles with magnets rather than using mechanical methods, such as wheels, axles and bearings. With maglev a vehicle is levitated a short distance away from a guide way using magnets to create lift and thrust. Maglev vehicles are claimed to move smoothly and quietly and to require less maintenance than wheeled mass transit systems. It is claimed that non-reliance on friction also means that acceleration and deceleration can far surpass that of existing forms of transport, marine propulsion is the mechanism or system used to generate thrust to move a ship or boat across water. Recent development in liquified natural gas fueled engines are gaining recognition for their low emissions, spacecraft propulsion is any method used to accelerate spacecraft and artificial satellites. Each method has drawbacks and advantages, and spacecraft propulsion is an area of research. However, most spacecraft today are propelled by forcing a gas from the back/rear of the vehicle at high speed through a supersonic de Laval nozzle

2.
Transport
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Transport or transportation is the movement of people, animals and goods from one location to another. Modes of transport include air, rail, road, water, cable, pipeline, the field can be divided into infrastructure, vehicles and operations. Transport is important because it enables trade between people, which is essential for the development of civilizations, terminals may be used both for interchange of passengers and cargo and for maintenance. Vehicles traveling on these networks may include automobiles, bicycles, buses, trains, trucks, people, helicopters, operations deal with the way the vehicles are operated, and the procedures set for this purpose including financing, legalities and policies. In the transport industry, operations and ownership of infrastructure can be public or private, depending on the country. Passenger transport may be public, where operators provide scheduled services, freight transport has become focused on containerization, although bulk transport is used for large volumes of durable items. Transport plays an important part in growth and globalization, but most types cause air pollution. While it is subsidized by governments, good planning of transport is essential to make traffic flow. A mode of transport is a solution that makes use of a type of vehicle, infrastructure. The transport of a person or of cargo may involve one mode or several of the modes, each mode has its own advantages and disadvantages, and will be chosen for a trip on the basis of cost, capability, and route. Human powered transport, a form of transportation, is the transport of people and/or goods using human muscle-power. Modern technology has allowed machines to enhance human power, human-powered vehicles have also been developed for difficult environments, such as snow and water, by watercraft rowing and skiing, even the air can be entered with human-powered aircraft. Animal-powered transport is the use of working animals for the movement of people, humans may ride some of the animals directly, use them as pack animals for carrying goods, or harness them, alone or in teams, to pull sleds or wheeled vehicles. A fixed-wing aircraft, commonly called airplane, is a craft where movement of the air in relation to the wings is used to generate lift. The term is used to distinguish this from rotary-wing aircraft, where the movement of the lift surfaces relative to the air generates lift, a gyroplane is both fixed-wing and rotary-wing. Fixed-wing aircraft range from small trainers and recreational aircraft to large airliners, two things necessary for aircraft are air flow over the wings for lift and an area for landing. The majority of aircraft also need an airport with the infrastructure to receive maintenance, restocking, refueling and for the loading and unloading of crew, cargo and passengers. While the vast majority of land and take off on land, some are capable of take off and landing on ice, snow

3.
Continuous track
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Continuous track, also called tank tread or caterpillar track, is a system of vehicle propulsion in which a continuous band of treads or track plates is driven by two or more wheels. The prominent treads of the plates are both hard-wearing and damage resistant, especially in comparison to rubber tyres. The aggressive treads of the tracks provide good traction in soft surfaces but can damage paved surfaces, in modern times, continuous track propulsion systems can be traced back to a crude continuous track system designed in the 1770s by Richard Lovell Edgeworth. Polish mathematician and inventor Józef Maria Hoene-Wroński conceived of the idea in the 1830s, the British polymath Sir George Cayley patented a continuous track, which he called a universal railway. Although not a track in the form encountered today, a dreadnaught wheel or endless railway wheel was patented by the British Engineer James Boydell in 1846. In Boydells design, a series of feet are attached to the periphery of the wheel. A letter of recommendation was signed by Sir William Codrington, the General commanding the troops at Sebastapol, a number of manufacturers including Richard Bach, Richard Garrett & Sons, Charles Burrell & Sons and Clayton & Shuttleworth applied the Boydell patent under licence. The British military were interested in Boydells invention from an early date, one of the objectives was to transport Mallets Mortar, a giant 36 weapon which was under development but, by the end of the Crimean war, the mortar was not ready for service. In those tests, a Garrett engine was put through its paces on Plumstead Common, the Garrett engine featured in the Lord Mayors show in London, and in the following month that engine was shipped to Australia. Nicholas works in 1856, again, after the close of the Crimean war, between late 1856 and 1862 Burrell manufactured not less than a score of engines fitted with dreadnaught wheels. Steam tractors fitted with wheels had a number of shortcomings and. In August 1858, more than two years after the end of the Crimean War, John Fowler filed British Patent No.1948 on another form of Endless Railway, comprising only eight sections, the track sections are essentially longitudinal, as in Boydells initial design. Further to Fowlers patent of 1858, in 1877, a Russian, Fyodor Blinov and it lacked self-propulsion and was pulled by horses. Blinov received a patent for his wagon in 1878, from 1881 to 1888 he developed a steam-powered caterpillar-tractor. This self-propelled crawler was successfully tested and featured at an exhibition in 1896. Steam traction engines were used at the end of the 19th Century in the Boer Wars, but neither dreadnaught wheels nor continuous tracks were used, rather roll-out wooden plank roads were thrown under the wheels as required. A little-known American inventor, Henery T. Stith, developed a continuous track prototype which was, in forms, patented in 1873,1880. The last was for the application of the track to a prototype off-road bicycle built for his son, the 1900 prototype is retained by his surviving family

4.
Vehicle
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A vehicle is a mobile machine that transports people or cargo. Typical vehicles include wagons, bicycles, motor vehicles, railed vehicles, Land vehicles are classified broadly by what is used to apply steering and drive forces against the ground, wheeled, tracked, railed or skied. ISO 3833-1977 is the standard, also used in legislation, for road vehicles types, terms. Boats were used between 4000 BC-3000 BC in Sumer, ancient Egypt and in the Indian Ocean, there is evidence of camel pulled wheeled vehicles about 3000–4000 BC. Wheeled vehicles pulled by men and animals ran in grooves in limestone, in 200 CE, Ma Jun built a south-pointing chariot, a vehicle with an early form of guidance system. Railways began reappearing in Europe after the Dark Ages, the earliest known record of a railway in Europe from this period is a stained-glass window in the Minster of Freiburg im Breisgau dating from around 1350. In 1515, Cardinal Matthäus Lang wrote a description of the Reisszug, the line originally used wooden rails and a hemp haulage rope and was operated by human or animal power, through a treadwheel. 1769 Nicolas-Joseph Cugnot is often credited with building the first self-propelled mechanical vehicle or automobile in 1769. In Russia, in the 1780s, Ivan Kulibin developed a human-pedalled, three-wheeled carriage with modern features such as a flywheel, brake, gear box and bearings, however and it was introduced by Drais to the public in Mannheim in summer 1817. 1903 Wright brothers flew the first controlled, powered aircraft 1907 First helicopters Gyroplane no.1, there are over 1 billion bicycles in use worldwide. In 2002 there were an estimated 590 million cars and 205 million motorcycles in service in the world, at least 500 million Chinese Flying Pigeon bicycles have been made, more than an other single model of vehicle. The most-produced model of vehicle is the Honda Super Cub motorcycle. The most-produced car model is the Toyota Corolla, with at least 35 million made by 2010, by far, most vehicles use wheels which employ the principle of rolling to enable displacement with very little rolling friction. It is essential that a vehicle have a source of energy to drive it, energy can be extracted from the surrounding environment, as in the case of a sailboat, a solar-powered car or a streetcar. Energy can also be stored, in any form, provided it can be converted on demand, the most common type of energy source is fuel. Batteries also facilitate the use of motors, which have their own advantages. On the other hand, batteries have low densities, short service life, poor performance at extreme temperatures. Like fuel, batteries store energy and can cause burns

5.
Cart
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A cart is a vehicle designed for transport, using two wheels and normally pulled by one or a pair of draught animals. A handcart is pulled or pushed by one or more people and it is different from a dray or wagon, which is a heavy transport vehicle with four wheels and typically two or more horses, or a carriage, which is used exclusively for transporting humans. Over time, the cart has come to mean nearly any small conveyance, from shopping carts to golf carts, without regard to number of wheels, load carried. The draught animals used for carts may be horses or ponies, mules, oxen, water buffalo or donkeys, carts have been mentioned in literature as far back as the second millennium B. C. The Indian sacred book Rigveda states that men and women are as equal as two wheels of a cart, hand-carts pushed by humans have been used around the world. In the 19th century, for instance, some Mormons travelling across the plains of the United States between 1856 and 1860 used handcarts, the history of the cart is closely tied to the history of the wheel. Larger carts may be drawn by animals, such as horses, mules and they have been in continuous use since the invention of the wheel, in the 4th millennium BC. Carts may be named for the animal that pulls them, such as horsecart or oxcart, in modern times, horsecarts are used in competition while draft horse showing. A dogcart, however, is usually a cart designed to carry hunting dogs, the term cart is also used for various kinds of lightweight, two-wheeled carriages, some of them sprung carts, especially those used as open pleasure or sporting vehicles. They could be drawn by a horse, pony or dog, the name survives today as a milkfloat. The seat is adjustable fore-and-aft to keep the vehicle balanced for two or four people, carts have many different shapes, but the basic idea of transporting material remains. Carts may have a pair of shafts, one each side of the draught animal that supports the forward-balanced load in the cart. The shafts are supported by a saddle on the horse, alternatively, the cart may have a single pole between a pair of animals. The draught traces attach to the axle of the vehicle or to the shafts, the traces are attached to a collar, to a yoke or to a harness on dogs or other light animals. Traces are made from a range of materials depending on the load, heavy draught traces are made from iron or steel chain. Lighter traces are often leather and sometimes rope, but plaited horse-hair. The dray is often associated with the transport of barrels, particularly of beer, of the cart types not animal-drawn, perhaps the most common example today is the shopping cart, which has also come to have a metaphorical meaning in relation to online purchases. Shopping carts first made their appearance in Oklahoma City in 1937, in golf, both manual push or pull and electric golf trolleys are designed to carry a golfers bag, clubs and other equipment

6.
Wagon
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A wagon is a heavy four-wheeled vehicle pulled by draught animals or on occasion by humans, used for transporting goods, commodities, agricultural materials, supplies and sometimes people. Wagons are immediately distinguished from carts and from lighter four-wheeled vehicles primarily for carrying people, wagons are usually pulled by animals such as horses, mules or oxen. They may be pulled by one animal or by several, often in pairs or teams, however, there are examples of human-propelled wagons, such as mining corfs. A wagon was called a wain and one who builds or repairs wagons is a wainwright. More specifically, a wain is a type of horse- or oxen-drawn, load-carrying vehicle, however, a two-wheeled haywain would be a hay cart, as opposed to a carriage. Wain is also a term for a chariot. Wain can also be a verb, to carry or deliver, a person who drives wagons is called a wagoner, a teamster, a bullocky, a muleskinner, or simply a driver. The exact name and terminology used is dependent on the design or shape of the wagon. If low and sideless may be called a dray, trolley or float, when traveling over long distances and periods, wagons may be covered with cloth to protect their contents from the elements, these are covered wagons. If it has a permanent top enclosing it, it may be called a van, many earlier designs required a very large turning radius, however, shrinking the width of the bed means decreasing the size of the load. As this is a problem that carts do not face, this factor, combined with their lighter weight, the general solutions to this problem involved several modifications to the front-axle assembly. The front axle assembly of a wagon consists of an axle, a pair of wheels, a round plate with a hole in its centre is located on the underside of the wagon. The plate on the wagon, in turn, sits on the plate on the axle between the wheels and this arrangement allows the axle and wheels to turn horizontally. The pin and hole arrangement could be reversed, the horse harness is attached to this assembly. This technique eventually led to further designs well-adapted to narrow areas, wagons have served numerous purposes, with numerous corresponding designs. As with motorized vehicles, some are designed to serve as functions as possible, while others are highly specialized. This section will discuss a broad overview of the classes of wagons, for details on specific types of wagons. Farm wagons are built for general usage in an agricultural or rural setting

7.
Rickshaw
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Rickshaw began as a two or three-wheeled passenger cart, called a pulled rickshaw, generally pulled by one man with one passenger. The first known use of the term was in 1887, over time, cycle rickshaws, auto rickshaws, and electric rickshaws were invented. Pulled rickshaws created a form of transportation, and a source of employment for male laborers. Their appearance was related to newly acquired knowledge of ball-bearing systems and their popularity declined as cars, trains and other forms of transportation became widely available. Auto rickshaws are becoming popular in some cities in the 21st century as an alternative to taxis because of their low cost. The word rickshaw originates from the Japanese word jinrikisha, which literally means human-powered vehicle, rickshaws were invented in Japan about 1869, after the lifting of a ban on wheeled vehicles from the Tokugawa period, and at the beginning of a rapid period of technical advancement in Japan. There are several theories about the inventor, jonathan Scobie, an American missionary to Japan, is also said to have invented the rickshaw around 1869 to transport his invalid wife through the streets of Yokohama. An American blacksmith Albert Tolman is said to have invented the rickshaw, or man drawn lorry, in 1846 in Worcester, Massachusetts, for a South American bound missionary. In New Jersey, the Burlington County Historical Society claims an 1867 invention by carriage maker James Birch, Japan historian Seidensticker wrote of the theories, Though the origins of the rickshaw are not entirely clear, they seem to be Japanese, and of Tokyo specifically. The most widely accepted theory offers the name of three inventors, and gives 1869 as the date of invention, the vehicle had a wooden carriage that rode on superior Western wheels and was a dramatic improvement over earlier modes of transportation. Whereas the earlier sedan chairs required two people, the rickshaw generally only required one, more than one person was required for hilly or mountainous areas. It also provided a ride for the passenger. Other forms of vehicles at the time were drawn by animals or were wheelbarrows, the Powerhouse Museum has had a rickshaw in its collection for 120 years. Finished in black lacquer-ware over timber, it was drawn by a single rickshaw runner and it became an inexpensive, popular mode of transportation across Asia. Peasants who migrated to large Asian cities often worked first as a rickshaw runner and it was the deadliest occupation in the East, the most degrading for human beings to pursue. Starting in 1870, the Tokyo government issued a permit to build and sell 人力車 to the trio that are believed in Asia to be the inventors, Izumi Yosuke, Takayama Kosuke. In order to operate a rickshaw in Tokyo, a seal was required from these men, by 1872, they replaced the palanquins and became the main mode of transportation in Japan, with about 40,000 rickshaws in service. At that time man-power was much cheaper than horse-power, horses were only used by the military

8.
Steam engine
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A steam engine is a heat engine that performs mechanical work using steam as its working fluid. Steam engines are combustion engines, where the working fluid is separate from the combustion products. Non-combustion heat sources such as power, nuclear power or geothermal energy may be used. The ideal thermodynamic cycle used to analyze this process is called the Rankine cycle, in the cycle, water is heated and transforms into steam within a boiler operating at a high pressure. When expanded through pistons or turbines, mechanical work is done, the reduced-pressure steam is then exhausted to the atmosphere, or condensed and pumped back into the boiler. Specialized devices such as hammers and steam pile drivers are dependent on the steam pressure supplied from a separate boiler. The use of boiling water to mechanical motion goes back over 2000 years. The Spanish inventor Jerónimo de Ayanz y Beaumont obtained the first patent for an engine in 1606. In 1698 Thomas Savery patented a steam pump that used steam in direct contact with the water being pumped, Saverys steam pump used condensing steam to create a vacuum and draw water into a chamber, and then applied pressurized steam to further pump the water. Thomas Newcomens atmospheric engine was the first commercial steam engine using a piston. In 1781 James Watt patented an engine that produced continuous rotary motion. Watts ten-horsepower engines enabled a range of manufacturing machinery to be powered. The engines could be sited anywhere that water and coal or wood fuel could be obtained, by 1883, engines that could provide 10,000 hp had become feasible. The stationary steam engine was a key component of the Industrial Revolution, the aeolipile described by Hero of Alexandria in the 1st century AD is considered to be the first recorded steam engine. Torque was produced by steam jets exiting the turbine, in the Spanish Empire, the great inventor Jerónimo de Ayanz y Beaumont obtained a patent for the first steam engine in history in 1603. Thomas Savery, in 1698, patented the first practical, atmospheric pressure and it had no piston or moving parts, only taps. It was an engine, a kind of thermic syphon, in which steam was admitted to an empty container. The vacuum thus created was used to water from the sump at the bottom of the mine

9.
Internal combustion engine
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An internal combustion engine is a heat engine where the combustion of a fuel occurs with an oxidizer in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal combustion engine the expansion of the high-temperature and high-pressure gases produced by combustion applies direct force to some component of the engine, the force is applied typically to pistons, turbine blades, rotor or a nozzle. This force moves the component over a distance, transforming chemical energy into mechanical energy. The first commercially successful internal combustion engine was created by Étienne Lenoir around 1859, firearms are also a form of internal combustion engine. Working fluids can be air, hot water, pressurized water or even liquid sodium, ICEs are usually powered by energy-dense fuels such as gasoline or diesel, liquids derived from fossil fuels. While there are many applications, most ICEs are used in mobile applications and are the dominant power supply for vehicles such as cars, aircraft. Typically an ICE is fed with fossil fuels like natural gas or petroleum products such as gasoline, there is a growing usage of renewable fuels like biodiesel for compression ignition engines and bioethanol or methanol for spark ignition engines. Hydrogen is sometimes used, and can be made from fossil fuels or renewable energy. Various scientists and engineers contributed to the development of internal combustion engines, in 1791, John Barber developed a turbine. In 1794 Thomas Mead patented a gas engine, also in 1794 Robert Street patented an internal combustion engine, which was also the first to use liquid fuel, and built an engine around that time. In 1798, John Stevens built the first American internal combustion engine, in 1807, Swiss engineer François Isaac de Rivaz built an internal combustion engine ignited by electric spark. In 1823, Samuel Brown patented the first internal combustion engine to be applied industrially, in 1860, Belgian Jean Joseph Etienne Lenoir produced a gas-fired internal combustion engine. In 1864, Nikolaus Otto patented the first atmospheric gas engine, in 1872, American George Brayton invented the first commercial liquid-fuelled internal combustion engine. In 1876, Nikolaus Otto, working with Gottlieb Daimler and Wilhelm Maybach, patented the compressed charge, in 1879, Karl Benz patented a reliable two-stroke gas engine. In 1892, Rudolf Diesel developed the first compressed charge, compression ignition engine, in 1926, Robert Goddard launched the first liquid-fueled rocket. In 1939, the Heinkel He 178 became the worlds first jet aircraft, at one time, the word engine meant any piece of machinery — a sense that persists in expressions such as siege engine. A motor is any machine that produces mechanical power, traditionally, electric motors are not referred to as Engines, however, combustion engines are often referred to as motors. In boating an internal combustion engine that is installed in the hull is referred to as an engine, reciprocating piston engines are by far the most common power source for land and water vehicles, including automobiles, motorcycles, ships and to a lesser extent, locomotives

10.
Railroad car
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A railroad car or railcar, railway wagon or railway carriage, also called a train car or train wagon, is a vehicle used for the carrying of cargo or passengers on a rail transport system. Such cars, when coupled together and hauled by one or more locomotives, alternatively, some passenger cars are self-propelled in which case they may be either single railcars or make up multiple units. The term car is used by itself in American English when a rail context is implicit. Indian English sometimes uses bogie in the manner, though the term has other meanings in other variants of English. In American English, railcar is a term for a railway vehicle, in other countries railcar refers specifically to a self-propelled, powered. Tables may be provided between seats facing one another, alternatively, seats facing in the same direction may have access to a fold-down ledge on the back of the seat in front. If the aisle is located between seats, seat rows may face the direction, or be grouped, with twin rows facing each other. In some vehicles intended for services, seats are positioned with their backs to the side walls. This gives a wide accessway and allows room for standing passengers at peak times, if the aisle is at the side, the car is usually divided into small compartments. These usually contain six seats, although sometimes in second class they contain eight, modern cars usually have either air-conditioning or windows that can be opened, or sometimes both. Various types of onboard train toilet facilities may also be provided, other types of passenger car exist, especially for long journeys, such as the dining car, parlor car, disco car, and in rare cases theater and movie theater car. In some cases another type of car is converted to one of these for an event. Observation cars were built for the rear of many trains to allow the passengers to view the scenery. Sleeping cars outfitted with small bedrooms allow passengers to sleep through their night-time trips, long-distance trains often require baggage cars for the passengers luggage. In European practice it used to be common for day coaches to be formed of compartments seating 6 or 8 passengers, in the UK, Corridor coaches fell into disfavor in the 1960s and 1970s partially because open coaches are considered more secure by women traveling alone. Another distinction is between single- and double deck train cars, an example of a double decker is the Amtrak superliner. A trainset is a semi-permanently arranged formation of cars, rather than one created ad hoc out of cars are available. These are only broken up and reshuffled on shed, trains are then built of one or more of these sets coupled together as needed for the capacity of that train

11.
Electric motor
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An electric motor is an electrical machine that converts electrical energy into mechanical energy. The reverse of this is the conversion of energy into electrical energy and is done by an electric generator. In normal motoring mode, most electric motors operate through the interaction between an electric motors magnetic field and winding currents to generate force within the motor, small motors may be found in electric watches. General-purpose motors with highly standardized dimensions and characteristics provide convenient mechanical power for industrial use, the largest of electric motors are used for ship propulsion, pipeline compression and pumped-storage applications with ratings reaching 100 megawatts. Electric motors may be classified by electric power source type, internal construction, application, type of motion output, perhaps the first electric motors were simple electrostatic devices created by the Scottish monk Andrew Gordon in the 1740s. The theoretical principle behind production of force by the interactions of an electric current. The conversion of energy into mechanical energy by electromagnetic means was demonstrated by the British scientist Michael Faraday in 1821. A free-hanging wire was dipped into a pool of mercury, on which a permanent magnet was placed, when a current was passed through the wire, the wire rotated around the magnet, showing that the current gave rise to a close circular magnetic field around the wire. This motor is often demonstrated in experiments, brine substituting for toxic mercury. Though Barlows wheel was a refinement to this Faraday demonstration. In 1827, Hungarian physicist Ányos Jedlik started experimenting with electromagnetic coils, after Jedlik solved the technical problems of the continuous rotation with the invention of the commutator, he called his early devices electromagnetic self-rotors. Although they were used only for instructional purposes, in 1828 Jedlik demonstrated the first device to contain the three components of practical DC motors, the stator, rotor and commutator. The device employed no permanent magnets, as the fields of both the stationary and revolving components were produced solely by the currents flowing through their windings. His motor set a record which was improved only four years later in September 1838 by Jacobi himself. His second motor was powerful enough to drive a boat with 14 people across a wide river and it was not until 1839/40 that other developers worldwide managed to build motors of similar and later also of higher performance. The first commutator DC electric motor capable of turning machinery was invented by the British scientist William Sturgeon in 1832, following Sturgeons work, a commutator-type direct-current electric motor made with the intention of commercial use was built by the American inventor Thomas Davenport, which he patented in 1837. The motors ran at up to 600 revolutions per minute, and powered machine tools, due to the high cost of primary battery power, the motors were commercially unsuccessful and Davenport went bankrupt. Several inventors followed Sturgeon in the development of DC motors but all encountered the same battery power cost issues, no electricity distribution had been developed at the time

12.
Stirling engine
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More specifically, the Stirling engine is a closed-cycle regenerative heat engine with a permanently gaseous working fluid. The inclusion of a regenerator differentiates the Stirling engine from other closed cycle hot air engines, originally conceived in 1816 as an industrial prime mover to rival the steam engine, its practical use was largely confined to low-power domestic applications for over a century. Stirling engines have a high efficiency compared to engines, being able to reach 50% efficiency. They are also capable of operation and can use almost any heat source. The heat energy source is generated external to the Stirling engine rather than by internal combustion as with the Otto cycle or Diesel cycle engines. This type of engine is generating interest as the core component of micro combined heat and power units, in which it is more efficient. However, it has a low ratio, rendering it more suitable for use in static installations where space. This contrasts with a combustion engine where heat input is by combustion of a fuel within the body of the working fluid. Most of the many possible implementations of the Stirling engine fall into the category of reciprocating piston engine, the Stirling engine was invented and patented by Robert Stirling in 1816. It followed earlier attempts at making an air engine but was probably the first put to use when, in 1818. The main subject of Stirlings original patent was a heat exchanger, the patent also described in detail the employment of one form of the economiser in his unique closed-cycle air engine design in which application it is now generally known as a regenerator. These generally operated at lower temperatures so as not to tax available materials and their selling point was that, unlike a steam engine, they could be operated safely by anybody capable of managing a fire. Several types remained in production beyond the end of the century, during the early part of the twentieth century the role of the Stirling engine as a domestic motor was gradually taken over by electric motors and small internal combustion engines. By the late 1930s, it was forgotten, only produced for toys. Around that time, Philips was seeking to expand sales of its radios into parts of the world where grid electricity and batteries were not consistently available. After a systematic comparison of various prime movers, the decided to go forward with the Stirling engine, citing its quiet operation. By 1951, the 180/200 W generator set designated MP1002CA was ready for production and a batch of 250 was planned. Additionally, the advent of transistor radios and their lower power requirements meant that the original rationale for the set was disappearing